/*
 * Doctor Wolverine — Kinetic Typography
 * Editorial reading room: cream paper + deep ink + brick-red printer's-ink
 * Aesthetic: kinetic-typography (designmd.app)
 */

/* ============================================================
   Tokens
   ============================================================ */
:root {
  /* Palette */
  --primary: #1A1A1A;
  --primary-50: #F1EEE7;
  --primary-900: #0A0A0A;
  --secondary: #3D3833;
  --accent: #C8421C;
  --neutral-50: #F5F1E8;
  --neutral-200: #E3DDD0;
  --neutral-500: #6B665E;
  --neutral-900: #1A1A1A;
  --bg: #F5F1E8;
  --surface: #FFFCF4;
  --surface-inverse: #1A1A1A;
  --text: #1A1A1A;
  --text-muted: #5C5751;
  --text-inverse: #F5F1E8;
  --accent-glaze: rgba(200, 66, 28, 0.08);
  --success: #3D6B3F;
  --warning: #9B6A1C;
  --danger: #8B2E20;
  --rule-ink: #1A1A1A;

  /* Layout */
  --max-width: 76rem;
  --container-px: clamp(1rem, 4vw, 2.5rem);
  --reading-max: 44rem;
  --gutter: 1.5rem;

  /* Typography */
  --font-display: 'Fraunces', 'Times New Roman', Georgia, serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', 'Courier New', monospace;

  --fs-h1-display: clamp(4rem, 14vw, 12rem);
  --fs-h1: clamp(2.5rem, 6vw, 4.5rem);
  --fs-h2: clamp(2rem, 4vw, 3.25rem);
  --fs-h3: clamp(1.25rem, 2vw, 1.625rem);
  --fs-h4: 1.125rem;
  --fs-body: 1.0625rem;
  --fs-small: 0.875rem;
  --fs-micro: 0.75rem;

  --lh-display: 0.86;
  --lh-heading: 1.05;
  --lh-body: 1.65;
  --lh-small: 1.5;

  --tk-display: -0.045em;
  --tk-h1: -0.03em;
  --tk-h2: -0.02em;
  --tk-eyebrow: 0.18em;
  --tk-caps: 0.06em;

  /* Components */
  --radius: 0;
  --rule-hair: 1px solid var(--neutral-200);
  --rule-ink-1: 1px solid var(--rule-ink);
  --rule-accent: 1.5px solid var(--accent);
}

/* ============================================================
   Reset & base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; height: auto; }

a {
  color: var(--text);
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0% 1.5px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 220ms ease-out, color 200ms ease-out;
  padding-bottom: 0.1em;
}
a:hover, a:focus-visible {
  background-size: 100% 1.5px;
  color: var(--accent);
}
@media (prefers-reduced-motion: reduce) {
  a { transition: none; }
}

:focus-visible {
  outline: 2.5px solid var(--accent);
  outline-offset: 3px;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

/* ============================================================
   Container & utilities
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--container-px);
  padding-right: var(--container-px);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--text);
  color: var(--bg);
  padding: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: var(--tk-eyebrow);
  z-index: 100;
}
.skip-link:focus { left: 0; top: 0; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Header / masthead — ink-on-cream
   ============================================================ */
.site-header {
  border-bottom: var(--rule-ink-1);
  background: var(--bg);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.site-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 36;
  background: none;
  color: var(--text);
}
.site-brand:hover { color: var(--accent); background: none; }

.site-nav ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: baseline;
}
.site-nav a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--fs-small);
  color: var(--text);
  padding-bottom: 0.15em;
}
.site-nav .num {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--accent);
  margin-right: 0.4em;
  letter-spacing: 0;
}
.site-nav a[aria-current="page"] {
  background-image: linear-gradient(var(--text), var(--text));
  background-size: 100% 2px;
}
.site-nav a[aria-current="page"] .num { color: var(--accent); }

.site-header-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-muted);
  letter-spacing: var(--tk-eyebrow);
  text-transform: uppercase;
}

/* ============================================================
   Hero — type-as-image
   ============================================================ */
.hero {
  padding: clamp(2.5rem, 8vw, 6rem) 0 clamp(2rem, 5vw, 4rem);
  border-bottom: var(--rule-hair);
  position: relative;
  overflow: hidden;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--tk-eyebrow);
  color: var(--accent);
  margin: 0 0 clamp(1.5rem, 4vw, 3rem);
  font-weight: 500;
}

.stage-word {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-h1-display);
  line-height: var(--lh-display);
  letter-spacing: var(--tk-display);
  color: var(--text);
  margin: 0;
  font-variation-settings: "opsz" 144, "SOFT" 0, "WONK" 0;
  word-break: break-word;
  hyphens: manual;
  text-wrap: balance;
}

/* Index hero only — background-clip showpiece treatment */
.stage-word--showpiece {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--text);
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  -webkit-background-clip: text;
          background-clip: text;
}
/* Graceful fallback */
@supports not (-webkit-background-clip: text) {
  .stage-word--showpiece {
    color: var(--text);
    -webkit-text-stroke: 0;
    background: none;
  }
}

.hero-subhead {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.125rem, 2.2vw, 1.625rem);
  line-height: 1.4;
  color: var(--text);
  max-width: 44rem;
  margin: clamp(1.5rem, 4vw, 2.75rem) 0 0;
  font-variation-settings: "opsz" 72;
}

.hero-lead-in {
  display: inline-block;
  opacity: 0;
  animation: fadeIn 600ms ease-out forwards;
}
@media (prefers-reduced-motion: reduce) {
  .hero-lead-in { opacity: 1; animation: none; }
}
@keyframes fadeIn {
  to { opacity: 1; }
}

.cta-row {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.04em;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--text);
  background: var(--text);
  color: var(--bg);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 200ms ease-out, color 200ms ease-out, border-color 200ms ease-out;
  background-image: none;
}
.btn:hover, .btn:focus-visible {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

.btn--secondary {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--text);
}
.btn--secondary:hover, .btn--secondary:focus-visible {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.5rem 0.75rem;
}
.btn--ghost:hover, .btn--ghost:focus-visible {
  color: var(--accent);
  background: transparent;
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
}

/* ============================================================
   Main / article layout
   ============================================================ */
main { display: block; }

.article-body {
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(3rem, 6vw, 5rem);
}

.reading-column {
  max-width: var(--reading-max);
}

.article-body section {
  margin-top: clamp(2rem, 4vw, 3.5rem);
}
.article-body section:first-child { margin-top: 0; }

/* Section dividers — full-width 1px ink rule with mono eyebrow above */
.article-body section + section {
  position: relative;
  padding-top: clamp(2rem, 4vw, 3.5rem);
  border-top: var(--rule-ink-1);
}

.section-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--tk-eyebrow);
  color: var(--accent);
  margin-bottom: 0.75rem;
}

/* Headings */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text);
  margin: 0 0 1rem;
}

h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-heading);
  letter-spacing: var(--tk-h1);
  font-weight: 900;
  font-variation-settings: "opsz" 96;
}

h2 {
  font-size: var(--fs-h2);
  line-height: var(--lh-heading);
  letter-spacing: var(--tk-h2);
  font-weight: 600;
  font-variation-settings: "opsz" 72;
  max-width: 32ch;
}

h3 {
  font-size: var(--fs-h3);
  line-height: 1.2;
  font-weight: 600;
  font-variation-settings: "opsz" 36;
  margin-top: 2rem;
}

h4 {
  font-size: var(--fs-h4);
  font-weight: 600;
  font-variation-settings: "opsz" 24;
}

/* Body prose */
.article-body p,
.article-body li {
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text);
}
.article-body p { margin: 0 0 1.25rem; }
.article-body p:last-child { margin-bottom: 0; }

.article-body ul, .article-body ol {
  margin: 0 0 1.5rem;
  padding-left: 1.5rem;
}
.article-body li { margin-bottom: 0.5rem; }

.article-body strong { font-weight: 600; }
.article-body em { font-style: italic; }

/* Mass paragraph — typographic lede */
.lede {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.125rem, 2vw, 1.625rem);
  line-height: 1.4;
  color: var(--text);
  margin: 0 0 2rem;
  max-width: 44rem;
  font-variation-settings: "opsz" 72;
}

/* Citation marker */
sup.cite {
  font-family: var(--font-mono);
  font-size: 0.7em;
  font-weight: 500;
  line-height: 1;
  vertical-align: super;
  margin-left: 0.05em;
}
sup.cite a {
  color: var(--accent);
  background: none;
  padding: 2px 4px;
  border-radius: 2px;
}
sup.cite a:hover,
sup.cite a:focus-visible {
  color: var(--bg);
  background: var(--accent);
}

/* Pull-quote */
.pull-quote {
  margin: 2.5rem 0;
  padding-left: 1.25rem;
  border-left: var(--rule-accent);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text);
  font-variation-settings: "opsz" 72;
}
.pull-quote cite {
  display: block;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  font-weight: 400;
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* Figures */
.fig {
  margin: 2.5rem 0;
  border: var(--rule-ink-1);
  background: var(--surface);
}
.fig img {
  width: 100%;
  height: auto;
  display: block;
}
.fig figcaption {
  padding: 0.75rem 1rem;
  border-top: var(--rule-ink-1);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: baseline;
}
.fig-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--tk-eyebrow);
  color: var(--accent);
  font-weight: 500;
  flex-shrink: 0;
}
.fig-caption {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--text-muted);
  line-height: var(--lh-small);
  margin: 0;
}

/* Callouts */
.callout {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--accent);
  background: var(--accent-glaze);
}
.callout-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--tk-eyebrow);
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.callout p {
  margin: 0 0 0.75rem !important;
  font-size: var(--fs-small);
}
.callout p:last-child { margin-bottom: 0 !important; }

.callout--warning {
  border: 1px solid var(--accent);
  border-left: 4px solid var(--accent);
}

.callout--danger {
  border-left: 4px solid var(--accent);
  background: transparent;
}
.callout--danger .callout-eyebrow {
  font-family: var(--font-mono);
  color: var(--accent);
}
.callout--danger .danger-line {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: 1rem;
  color: var(--text);
  margin-top: 0.5rem;
}

/* Tables */
.table-wrap { overflow-x: auto; margin: 2rem 0; }
table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}
table th,
table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: var(--rule-hair);
  font-size: var(--fs-small);
  vertical-align: top;
}
table th {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
  border-bottom: 1.5px solid var(--text);
  color: var(--text);
}
table td.num {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
}

/* References list */
.references-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: refnum;
}
.references-list li {
  padding: 1rem 0 1rem 3rem;
  border-bottom: var(--rule-hair);
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--text);
  position: relative;
}
.references-list li::before {
  content: "[" attr(data-num) "]";
  position: absolute;
  left: 0;
  top: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--accent);
  letter-spacing: 0;
}
.references-list a.ref-link {
  display: inline-block;
  margin-top: 0.25rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--accent);
  letter-spacing: 0;
}

/* FAQ items */
.faq-list { margin: 0; }
.faq-list h2 {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 600;
  font-variation-settings: "opsz" 48;
  letter-spacing: -0.015em;
  margin: 2.5rem 0 1rem;
  max-width: 38ch;
}
.faq-list > section:first-child h2 { margin-top: 0; }

/* Contact form */
.contact-form {
  margin: 2.5rem 0;
  display: grid;
  gap: 1.25rem;
  max-width: 38rem;
}
.contact-form label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--tk-eyebrow);
  color: var(--text);
  font-weight: 500;
  margin-bottom: 0.4rem;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--text);
  background: var(--surface);
  color: var(--text);
  border-radius: 0;
}
.contact-form textarea { min-height: 8rem; resize: vertical; }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2.5px solid var(--accent);
  outline-offset: 2px;
}

/* ============================================================
   Footer — two-band: cream top + ink-inverse bottom
   ============================================================ */
.site-footer {
  margin-top: clamp(3rem, 6vw, 5rem);
}
.footer-top {
  background: var(--bg);
  border-top: var(--rule-ink-1);
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}
.footer-cols {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}
@media (min-width: 600px) {
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .footer-cols { grid-template-columns: repeat(5, 1fr); }
}
.footer-cols h3 {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--tk-eyebrow);
  color: var(--text);
  font-weight: 500;
  margin: 0 0 1rem;
}
.footer-cols ul {
  list-style: none;
  margin: 0; padding: 0;
}
.footer-cols li { margin-bottom: 0.5rem; }
.footer-cols a {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--text);
}

.footer-bottom {
  background: var(--surface-inverse);
  color: var(--text-inverse);
  padding: clamp(2.5rem, 5vw, 4rem) 0;
}
.footer-purpose {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 96;
  color: var(--text-inverse);
  margin: 0 0 1rem;
  max-width: 32ch;
}
.footer-disclaimer {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--text-inverse);
  margin: 0 0 1rem;
  max-width: 60rem;
  opacity: 0.85;
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  line-height: 1.55;
  color: var(--text-inverse);
  letter-spacing: 0;
  margin: 0;
  max-width: 60rem;
  opacity: 0.65;
}
.footer-bottom a { color: var(--text-inverse); }
.footer-bottom a:hover { color: var(--accent); }

/* ============================================================
   Tippy override (light-border theme)
   ============================================================ */
.tippy-box[data-theme~='light-border'] {
  background: var(--text);
  color: var(--bg);
  border: none;
  border-radius: 0;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  line-height: 1.45;
  padding: 0.1rem 0.25rem;
}
.tippy-box[data-theme~='light-border'] .tippy-content {
  padding: 0.6rem 0.85rem;
}
.tippy-box[data-theme~='light-border'][data-placement^='top'] > .tippy-arrow::before {
  border-top-color: var(--text);
}
.tippy-box[data-theme~='light-border'][data-placement^='bottom'] > .tippy-arrow::before {
  border-bottom-color: var(--text);
}

/* ============================================================
   404
   ============================================================ */
.notfound {
  padding: clamp(4rem, 12vw, 10rem) 0;
  text-align: left;
}
.notfound h1 {
  font-size: var(--fs-h1-display);
  line-height: var(--lh-display);
  letter-spacing: var(--tk-display);
  font-weight: 900;
  font-variation-settings: "opsz" 144;
  margin: 0 0 1rem;
}
.notfound p {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  max-width: 38rem;
  margin: 0 0 1.5rem;
}

/* ============================================================
   Responsive header layout
   ============================================================ */
@media (max-width: 760px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }
  .site-nav ul { gap: 0.75rem 1rem; }
  .site-nav .num { display: inline; }
}